/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/Abilities/GameplayAbility.h
True if the owning actor is locally controlled, true in single player
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, BlueprintPure=false, Category=Ability, Meta=(ExpandBoolAsExecs="ReturnValue")) bool IsLocallyControlled() const